The Flywheel Housing, also known as a bell housing, is a metal casing that encloses the flywheel and connects the engine to the transmission. It is typically bolted to the back of the engine block and contains an opening for the starter motor to engage with the flywheel. The Flywheel Housing serves as a protective cover for both the flywheel and clutch components inside, shielding them from dirt and debris while also providing a mounting point for other drivetrain components.